The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 19, 2010
Filed:
Oct. 20, 2006
Hideki Kuwajima, Fukui, JP;
Yasuchika Kudo, Fukui, JP;
Hideki Kuwajima, Fukui, JP;
Yasuchika Kudo, Fukui, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An opening and closing device which includes a roughly cylindrical stator, a concavo-convex stator cam provided at an end of the stator, a ring-like rotor rotatably disposed relative to the stator, a rotor cam opposedly protruding from an inner periphery or outer periphery of the rotor, and a spring pushing the rotor against the stator. The rotor cam slides on the concavo-convex stator cam during the opening and closing operations. In this structure, the opening and closing device is openable roughly up to 180°, and a force in the opening direction is applied to a movable housing even when the movable housing is opened not less than 165°. Accordingly, this opening and closing device eliminates wobbling in the opening and closing direction, and ensures reliable opening and closing operations and retention at a predetermined angle.